Portable thulium x-ray unit with separable universal mounting means



June 16, 1959 E. w. COLEMAN ET AL 2,891,167

' ,PORTABLE THULIUM x-RAY UNHl WITH SEPARABLE UNIVERSAL MOUNTING MEANSFiled Aug. 14, 1956 4 sheets-sheet 1 June 16, 1959 .w. COLEMAN ETAL2,891,167 T PORTABLE THULIUM x-RAY UNIT WITH SEPARABLE UNIVERSALMOUNTING MEANS Filed Aug. 14, 1956 4 Sheets-Sheet 2 UNIT EUGTNF VY.COLEMAN LAWRENCE fr. /fHO//V June 16, 1959 E. w. coLEMA E1' AL 2,891,167PORTABLE THULIUM x-NAY UN w SEPARABLE UNIVERSAL MOUNTING M A s FiledAug. 14, 1956 4 Sheets-Sheet 5 June 16, 1959 E. w. COLEMAN ET Al.2,891,167

PORTABLE THULIUM X-RAY UNIT WITH SEPARABLE UNIVERSAL MOUNTING MEANS 4SheetsSheet 4 Filed Aug. 14, 1956 WW m wmf w United States Patent-2,891,167 Patented June 16, 1959 [ice PORTABLE THULIUM X-'RAY UNIT WTHSEP- ARABLE MOUNTING MEANS Eugene W. Coleman 'and Lawrence H. Krohn, Ann

Arbor, Mich., assignors to the United States of America as representedby the Secretary of the Army Application August 14, 1956, Serial No.604,051

Claims. (Cl. Z50- 105) (Granted under Title 35, U.S. Code (1952), sec.265) The invention described herein may be manufactured and used yby orfor the Government for governmental purposes without the payment of anyroyalty thereon.

This invention relates to radiographic equipment, and more particularlyto a` portable radiographic apparatus employing a radioactive isotype asthe radiation source and suitable for human diagnostic radiography.

Containers presently used for portable radiographic equipment employingradioactive substances are awkward to transport and do not permitrealization of the maximum attainment in portability due to the factthat the support stand for the container is integral with the containerand usuallyincludes additional structural elements permittingorientation of the X-ray unit relative to the supporting stand. Theseadditional structural elements add weight, and in the event theequipment is used extensively in the field, are subject to damage,making it dii'licult or impossible to operate the equipment. Someportable devices even employ small carts for transporting theradioactive material container which, as can be appreciated, does notprovide the ultimate in portability, especially `for military eld use. Anovel portable radiographic equipment described in application SerialNo. 604,052, filed August 14, 1956, now abandoned, while overcoming manydisadvantages of such equipment, requires a carrying and supportingframe of metal to protect the person transporting it against harmfulradiation and requires a mechanical structure to orient the containerrelative to the support, all of which adds weight and bulk to a portableequipment. The instant device overcomes these difficulties by providinga novel combination of container andsupport for an improved portableradiographic equipment which permits orientation of the container withrespect to the support therefor, not only in a `fixed arc `but alsouniversal adjustment, without the need fo structural elements toaccomplish `such orientation which permits'reduction in both bulk andweight of such equipment, making an ideal unit for emergency eld use forboth military and civilian applications.

Research has proven that radioactive thulium may be used for`radiographing human subjects Without producing any harmful biologicaleffects. While portable devices as in the `instant invention are notintended to replace the conventional X-ray tube type equipment insofaras definition and contrast are concerned, nevertheless it is `consideredthe instant improved portable radiographic equipment is a valuableadjunct in the field of diagnostic radiographic equipment because of thereduction inbulk and weight which enhance the portability of suchequipment, simplicity of operation, and lack of dependence on electricalpower sources such as in X-ray tube devices. i

In view `of the diiculties4 inherent in portable radiographic equipmentas described above, it is a principal object of the instant invention toprovide a portable radiographic equipment wherein orientation of theradioactive material container portion relative to its support may beaccomplishedl without the use of structural'elements interconnecting thecontainer and the support therefor to accomplish such orientation.

It is a further object of the instant invention to provide portableradiographic equipment wherein the radioactive material containerportion may be readily separated from a supporting structure thereforwithout eiecting any mechanical disengagement.

it is a further object to provide portable radiographic equipmentwherein the radioactive material container may be universally adjustedrelative to a support therefor.

It is also an object of the instant invention to provide portableradiographic equipment capable of being safely transported and operatedVby a single person and which is of rugged construction for field usewhich embodies minimum bulk and weight.

i Other objects of the invention will become apparent from the followingdescription, in which- Fig. l is a perspective view of the combinationof the radioactive material container and the support therefor showingthe manner in which the container is seated for universal movement inthe support when the equipment is in use;

Fig. 2 is a central vertical sectional view of the lower portion of theradioactive material container showing the closure plug and supportingbracket in full lines when partially removed andin dotted lines` whenfully removed; l

Fig. 3 is a view in elevation, showing `details of the handle of theradioactive material container;

Fig. 4 is a central vertical sectional View taken on the line 4,--4 ofFig. 3;

Fig. 5 is a plan view of a nut `included in the container structure;

Fig. 6 is an elevational view of the nut shown in Fig. 5;

Fig. 7 is a plan view of an internally threaded cap included in thecontainer structure and engages the nut shown in Fig. 6;`

Fig. 8 is a central vertical sectional illustrated in Fig. 7;

Fig. 9 is a horizontal view partly in section taken on the line 5 5 ofFig. 4 showing the shutter in the closed position in full lines, and inthe open position in dotted lines;

Fig. 10 is a vertical sectional view taken on the line 6-6 of Fig. 9;

Fig. 1l is a horizontal view taken on the line 7--7 of Fig. 4 with theshutter in the closed position;

Fig. l2 is a perspective view looking into the lower end of the upperportion of the radioactive material container;

Fig. 13 is a perspective view of the upper end of the lower portion ofthe radioactive material container showing the shutter structure with`the shutter in the closed position;

Fig. 14 is a plan view of the hinged bracket for carrying the'closureplug for the radioactive material container; and

Fig. l5 is avertical sectional viewtaken on the line 8 8 of Fig. 14.

The structure of the radioactive material container may be bestdescribed by reference to Figs. 3 and 4 wherein the container is shownas including an upper portion 1 and a lower portion 2. `The upperportion 1 is solid except for the centrally located recess 2 to receivethe capsule 3 containing the radioactive material view of the cap 4 andthe bore 5 for passage of the cable release 6. Ari` aluminum shell 7cncascs the `.lead upper portion 1. The lower lead portion 2 is` alsoencased in an aluminum shell 8 except for a b rass disc 9 on Vthe outerface of lthe lead plug 10. The upper portion 1 and the lower portion Vtobe described in greater detail hereafter.

2 are secured together by machine screws 11 recessed as at 13 to presenta smooth surface. The machine screws are received in tapped holes 12spaced around the meeting edge of the upper ,portion 1. The embodi* mentshown s` generally Vpear-shaped, but obviously other coniigurations'maybe used provided that the lower portion 2 has the inwardly slopingcontour shown as at '21 forga purpose which will Abe more fullydescribed hereafter-.fV An' externally threaded nut 14 Vis Vcastintegral with the upper portion 1 for engagement with an iiiternallythreaded cap 15 provided with holes 17 to receive a Spanner wrench. Thecap 1,5fhas an aluminum window 16 which closes the recess l2 but permitsradiation-from the radioactive source material 4 to pass through. Therecessed portion 17 communicates with a larger recess 18 which receivesthe shutter mechanism The upper portion 1 is further contoured at themeeting surface thereof as at 19 to receive Vthe raised area 20 on themeeting surfaceof the lower portion'2.

The lower portion V2 has anV inwardly tapered passage 27. The lead plughas a brass outer shell 22 enclosing the tapered portion thereof, andwhen the apparatus is not in use, the brass encased plug 10 is seated inthe passage 27. The innermost end of the passage 27 Vis sealed by a thinmetallick plate 23, such as aluminum or other metal having similarproperties, which will not obstruct radiation when the shuttermechanism' is operated to permit emanations to pass through the passage27. The brass encased lead plug 10 is secured by flathead machine screws24 to a'bracket 25 by which the plug 10 may be droppedout of the passage27 a short distance and then rotated about the hinge 26, as shown inFig. 2, to completely open the passage 27. The hinge 26 includes aU-shaped yoke 28 secured by machine screws 29 to the lower portion 2,and the bight portion 28'V thereof abuts the peripheral edges of boththe upper and lower portions 1 and. 2, respectively. The upstandingparts 30 of the yoke 28 are provided with holes 31 to'receive the hingepin 32 which is maintained in position by means of a snap ring 33 whichseats in a groove 34 in the end of the `hinge pin 32. The end of thebracket 25, which engages the hinge pin 32, is provided with anelongated slot 35 which, when the bracket 25 is released by the key 36,permits the bracket 25 to drop vertically iirst before being rotatedwhen it is desired to remove the plug 10. The bracket has an elongatedthrough slot 37 and an elongated recess 38 at right angles thereto. Whenit is desired to remove the plug 10, the key 36 is lifted slightlyagainst the pressure of spring washer 39 and rotated 90 degrees topermit the key 36 to pass through the slot 37 allowing the bracket 25 todrop and be rotated. When the plug 10 is in the closed position, the key36 is rotated to be at right angles to the slot 37 and held by thepressure of the spring washer 39 in the recess 38. The shank portion 40of the key 36 abuts on arresilient cushion 41 seated in a recess 42inthe lower portion 2. A'at washer 43 is positioned between the upset endof the shank portion 40 and the spring washer 39. A plate 44 is securedin any suitable manner to the lower portion 2 and provides a seat forthe spring` washer 39.

A part of the aluminum shell 7, forming the apex 45 of the upperlportionr 1 of the'containenris of elongated configuration with theprincipal axis thereof normal to thev center line'about which thecontainer is symmetrical. The apex 45 has a bore 46 therethrough whichhas an expanded portion47 adjacent one end of the bore 46 to receiveaspring 48. A pin 49 passes through the bore 46 and has a bolt 50secured in one end thereof and coactsV with the spring 48 to maintain abail or handle 51 `in la 'desired position.

Reference is no w made to Figs. 9-13 for a description of theV shuttermechanism which is located on the raised area 20 of Vthe lower portion 2and received in` the recess 18 when the upper and lower portions 1 and2, respectively, are in assembledV condition. The shutter 52 is mountedon a bearing 53 carried by a stud 54 secured in the raised area 20` onthe lower portion 2. A shde strip 55 is also secured to the raised area20 on the lower portion 2 beneath `the shutter 52 by pins 56. Thearcuate travel of the shutter when moving from the closed to openposition or vice versa vis limited by the pins 56. The shutter 52, whichmay be Vbrass or other suitable material, has a gold insert 57 cast inthe shutter and pressed to prevent escape of radiation when the shutteris closed. An anchor pin 58 is also secured in the raised area 20 in alocation relative to the shutter 52 to permit the cable release 6 whensecured in the bore 59 through the anchor pin 58 to be aligned with anedge 6@ of the shutter. Operation of the cable release 6 by means of thecable release button 61 will move the shutter 52 in an arcuate path, asshown inV dotted outline in Fig. 9, against the tension of a spring 62which is carried by a stud 69. One arm 63 of the spring 62 is seated ina slot 64 in the edge 65 of the shutter 52, and the other arm 66 of thespring 62 is secured in the post 67. The shutter is provided with aprojection 68 on the edge to prevent the cable release wire from gettingout of contact with the shutter 52.

A particularly novel feature of the structure of the instant inventionresides in the 4adjustment of the radioactive material containerrelative to its support. The tripod support is shown in Fig. l andcomprises a generally ring-shaped memberv o'r collar 70 to whichtelescoping legs 71 are secured as shown in Fig. 2.

The member 70 isgnot continuous in order to permit the bracket 25 to bedropped when it is desired to take a radiograph. it is to be understoodthat other types of adjustable legs andmeans of fastening them to themember 78 may be practiced without departing from the scope of theinvention. The size and exterior coniguraJ tion of the lower portion 2of the radioactive material container coact with the ring-shaped member7dv to permit universal adjustment of the container relative to thesupport. Reference to Figs. l and 2 illustrates the manner in which theinwardly sloping configuration of the exterior surface of the lowerportion 2`is seated with in the ring-shaped member 70 and coactstherewith to permit the universal adjustment of the containerrela tiveto'the support, and for rapid setting up and dismantlingrof theequipment without benefit of mechanicai components interconnecting thecontainer and its sup`J port. It is obvious that the universal movementof the' container andthe support is limited` by the bracket 25, and inoperation the hinge 26 is aligned with the open" end of the ring-shapedmember' 70. Such economy of parts adds to the portability and provides aconsiderable' reduction in bulk and weight of the equipment which isimportant for iield use. Y

When it is desired to operate the equipment, the sup port tripod legsare adjustedto the desired subject-toh source height and position andthe` radioactive material container is seated on the ring-shaped member70 and oriented to the desired position relative to the support. Thecontainer may be tilted in the ring-shaped member 70 by virtue of theinwardly sloping sides of the exterior surface of the lower portion 2.The position selected will be maintained since the general conical shapeof the container places the center of gravity adjacent the base of thecontainer. Upon selection of the proper position, the passage 27 may beopened by rotating the key 36 to permit passage through the slot 37 sothat the bracket 25 carrying the plug 10 may drop and be rotated toremove the plug 10 from the passage 27.l A radiograph may then be taken,using either conventional X-ray film or a self-contained cassette 72 bypressing the cable release button 61 and holding it forthe time requiredfor the exposure. The self-contained type cassette which forms nopart ofthe present-invention, may be one wherein the developer and Stabilizerare components: of the film packet, for example, as in the Polaroidmethod of rapid processing by means of individual capsules of combinedgelatinous developer and stabilizer which are integral parts of the filmpacket. The self-contained cassette permits rapid processing ofradiographs and is especially desirable for field use. Where available,conventional X-ray film holders and methods of developing radiographsmay be used. If intensifying screens are used, the screen is insertednext to the sensitive paper and the entire assembly placed in a filmholder. Following exposure, the screen is removed and the paperprocessed either by the conventional method or by the Polaroid method.

Vln one embodiment of the invention, the radioactive material containermeasured 5% diameter at the base and, including the bail, was 61%5 highand weighed about pounds. The weight depends upon the amount of:shielding required for the radioactive source. If the source is free ofradioactive contaminants, the dose rate is low and less shielding isrequired than when the contaminants are present.

The radioactive source 4 in one embodiment of the invention was a rightcylinder of thulium metal 4 mm. in diameter and 4 mm. high. weighing 400mg. The source 4 was encapsulated in an aluminum container or capsule 3and secured in the recess 2. The radioactive source used in the instantinvention is an isotope of thulium, thulium-170, which is obtained byactivating naturally occurring thulium-169 by neutron bombardment. Sincethe half-life of the radioactive source, for example thulium-170, asused in one embodiment, is 129 days, replacement of the source 4 will berequired. Such replacement may be accomplished by methods Well known inthe art which prevent personnel from being subjected to harmfulradiation. l

Isotopes, such as thulium-170, used in the instant device, should havethe following characteristics to be useful for human radiography: (a)the majority` of the emitted photon energy should lie in therange ofapproximately 50 to 100 kev. since `these energies produce maximumcontrast on lrns; (b) the specific activity (curies/ gram) should besufficiently high so that a source size approximating a point willproduce maximum definition; and (c) the physical half-life should besufficiently long lso that the source will be `useful for reasonablelengths of time. With facilities presently available, higher activityper unit Weight is attainable, thus permitting a closer approximation ofa point source without a decrease in dose rate. The focal spot of thesource in one embodiment was 4 mm. Reduction to 2 mm. would produceconsiderably better definition in the radiographs. The use of higheractivity and more pure thulium would improve the ratio of hard radiationto sof radiation in the beam. In the 4 mm. source, the activity in thetop of the source cylinder contributes little radiation of the energiesdesired, 50 to 100 kev., since photons of this energy are absorbedbefore they can penetrate the thickness of the source. The hardbremsstrahlung produced by beta particles liberated in this area,however, is able to penetrate and contribute to the diffuse fogging,lack of contrast, of the ilm.

Thulium-l70 decays with the emission of beta particles having peakenergies of 0.84 and 0.97 meV., and 84 kev. gamma ray photons.Associated with the decay is an internal conversion electron whichresults in the emission of 52 kev. ytterbium X-ray. In small samplesthese radiations would presumably be the principal ones of importance.In large sources the bremsstrahlung, or radiation liberated bydeceleration of beta particles, must be considered. The principalpenetrating radiations from thulium-170 consists of an 84 kev. gamma rayand a 52 kev. X-ray. In large samples, however, self-absorption tends tolower the output of these radiations and the brems'strahlung produced bydeceleration of beta particles in either the container or the source ofmaterial itself becomes important. Both these factors tend to alter thespectrum of radiation energies and the resulting radiation differs:considerably from that obtained in small samples. Absorptionmeasurements made to obtain a rough estimate of the spectrum, :indicatedthat an appreciable portion of the radiations possessed energies inexcess of 10() kev., and that the softer radiations, below 100 kev.,were present in far smaller quantities than would be expected fromsimple consideration of the decay scheme of thulium-170. Presumably thislatter result was due to self-absorption of much of the radiation by thesource material. The hard component was considered to be due tobremsstrahlung and to a source contaminant thought to be tantalum-l82which complicates the `shielding problem because of the high gammaradiation, and interferes to a slight extent with the production ofradiographs.

Measurements of the intensity of the radiation output of one embodimentof the invention were made using Victoreen ionization chambers. Repeateddeterminations indicated an output `of 6.8 r./hr. at one foot and atotal curie strength of about cur-ies.

Since paper X-ray pictures presented certain advantages overtransparencies for field use, radiographs taken under simulated fieldconditions with the device of the instant invention were made withradio-sensitive paper rather than film.. For most pictures the sourcewas operated at an lS-inch source-to-subject distance. Exposure times of12 to 19,0 seconds, depending upon intensifying screen used, thicknessof tissue, etc., have proved satisfactory for most objects. The dosageof radiation delivered by exposures of these durations Varied from 10 to160 mr. which corresponds favorably with the 40 to 220 mr. required froma conventional 80` kvp. X-ray machine for standard radiographs.

Because of the width of spectral energies obtained with the unit of theinstant invention, it is possible to obtain radiographs of any portionof the body. Because of selfabsorption of soft radiations and thepresence of external and internal bremsstrahlung, it appears likely thatany high curie strength isotopic source will provide a wide spectrum ofenergies rather than monoenergetic beams. lf, by furtherrelinement ofthe radioactive source material, an approximately monoenergetic beamcould be obtained, it would still bedicult to match the results obtainedby the conventional X-ray machine where the relatively narrow spectrumof energies can be varied at will to give optimum results with variousbody thicknesses. While the unit of the instant linvention has beendescribed using a radioisotope, thulium-169, other radioisotopes may beused with appropriate changes in shielding material dirnensions or abattery of isotopes of various energies may e incorporated in the unitand different ones used for different thicknesses of body parts withoutdeparting from the scope of this invention.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent is:

l. The combination in a portable X-ray apparatus of a container for aradioactive source andd a separable support therefor, said containerincluding upper and lower interfitting members of material impervious toemanations of radioactive material, said lower member having an inwardlyinclined exterior surface, a. cavity in said upper portion, aradioactive source located in said cavity, a central conical passage linsaid lower member aligned with said cavity, shutter means interposedbetween said radioactive source and said conical passage, a removableplug nonnally located in said conical passage, a bracket carrying saidplug and hingedly secured externally of said container, means forlocking said bracket to retain said plug in said conical passage, saidsupport including a plurality of independently adjustable legs and aring-shaped member xedly carried on said legs transversely thereof forengaging the inwardly inclined exterior surface of said lower member andcoacting therewith to permit universal adjustment of said containerrelative to said support.

V2. A'portable X-ray napparatus comprising, in combination, a conicallyshaped container separable transversely of the longitudinal axis thereofinto an upper solid member having a central cavity and a solid basemember having a central conical passage and a raised central area, aradioactive source located in saidcavity, said upper member having adepression concentric with said cavityfor receiving saidraisedV centralarea when said upper and lower members are assembled, a recess in saidupper member communicating with said cavity adjacent the raised area ofsaid lower member when said upper and lower members are assembled, aiirst septum closing said cavity and a second septum closing the innerend of said conical passage, shutter means interposed between said firstand second septums for controlling the passage of radiation from saidradioactive vsource through said conical passage, a removable plugnormally seated in said conical passage, a bracket carrying said plugand hingedly secured exteriorly of said container to permit freeswinging motion of said bracket when removing said plug from saidconical passage, means for locking said bracket to retain said plug insaid conical passage, a bail secured externally to said container, saidbase member having an inwardly inclined surface, and an adjustablesupport including adiscontinuous ring-shaped member engaging theinwardly inclined surface of said base member permitting universaladjustment of said container relative to said support and free swingingmotion of said bracket in a path normal to the plane of said ring-shapedmember.

3. Apparatus as recited in claim 2 wherein said shutter means includesan arm pivotally secured to said raised area of said base member, saidarm having an vinsert therein in registering position with said'cavityin the normalV Vversely of the longitudinal axis of the container, saidupper portion having a cavity therein, a radioactive source carried insaid cavity, a recess communicating with said cavity and extendinghorizontally outwardly from the open end of saidcavity, a depressionformed in the upper portion forward of said recess and concentric withsaid cavity, said base poi-'tio' Vincluding a conical passage axiallyaligned with saidl cavity anda raised area on the meeting` surfacethereof, said raised area engaging said depression when said upper andbase portions are in assembled condition, shutter means pivotallycarried by said raised` area for arcuate movement in said recess andinterposed between said cavity and said conical passage for controllingthe passage of radiation through said conical passage from saidradioactive source, means for actuating said shutter means, a removableplug normally located in said conical passage, a bracket hingedlysecured exteriorly to said container and carrying said plug to permitfree swinging movement of said plug upon removal thereof from saidconical passage, means locking said bracket in position to retain saidplug lin said conical passage, and means `for carrying said container.

5. A portable X-ray apparatus comprising, in combination, a containerfor a radioactive source having separable upper and lower portions ofmaterial impervious to emanations of radioactivematerial, said lowerportion having an inwardly inclined exterior surface, a cavity in saidupper portion, al radioactive source located in said cavity, a centralconical passage in said lower portion alignedA with said cavity, spacedupper and lower septum means interposed between said cavity and saidconical passage and dimensionally greater than the adjacent opening ofsaid conical passage, shutter means located between said spaced upperand lower septum means, a removable plug normally located in saidconical passage, a bracket carrying said plug and hingedly securedexternally of said container, means for locking said bracket to retainsaid plugin said conical passage and an adjustable support including anopen ring-shaped portion for engaging the inwardly inclined exterior`surface f said lower portion whereby said container is universallyadjustable relative to said'suppc'art.

` VReferences Cited in the le of this patent UNITED STATES PATENTS2,551,491 Gilks May 1, 1951 2,684,447 Gilks July 20, 1954 2,743,372Browne et al Apr. 24, 1956 2,764,694 vKinzer Sept. 25, 1956 2,772,361Hiestand Nov.`27, 1956 Offner Feb. 12, 1957

1. THE COMBINATION IN A PORTABLE X-RAY APPARATUS OF A CONTAINER FORRADIOACTIVE SOURCE AND A SEPARABLE SUPPORT THEREFOR, SAID CONTAINERINCLUDING UPPER AND LOWER INTERFITTING MEMBERS OF MATERIAL IMPERVIOUS TOEMANATIONS OF RADIOACTIVE MATERIAL, SAID LOWER MEMBER HAVING AN INWARDLYINCLINED EXTERIOR SURFAE, A CAVITY IN SAID UPPER PORTION, A RADIOACTIVESOURCE LOCATED IN SAID CAVITY, A CENTRAL CONICAL PASSAGE IN SAID LOWEMEMBER ALIGNED WITH SAID CAVITY, SHUTTER MEANS INTERPOSED BETWEEN SAIDRADIOACTIVE SOURCE AND SAID CONICAL PASSAGE, A REMOVABLE PLUG NORMALLYLOCATED IN SAID CONICAL PASSAGE, A BRACKET CARYING SAID PLUG AN DHINGEDLY SECURED EXTERNALLY OF SAID CONTAINER, MEANS FOR LOCKING SAIDBRACKET TO RETAIN SAID PLUG IN SAID CONICAL PASSAGE, SAID SUPPORTINCLUDING A PLURALITY OF INDEPENDENTLY ADJUSTABLE LEGS AND A RING-SHAPEDMEMBER FIXEDLY CARRIED ON SAID LEGS TRANSVERSELY THEREOF FOR ENGAGINGTHE INWARDLY INCLINED EXTERIOR SURFACE OF SAID LOWER MEMBER AND COATINGTHEREWITH TO PERMIT UNIVRSAL ADJUSTMENT OF SAID CONTAINER RELATIVE TOSAID SUPPORT.